The utility model discloses a system for spraying and disinfecting pig carrying vehicle when entering into factory, and is characterized in that the utility model comprises a disinfection water tank (2), and the disinfection water tank (2) is provided with a main pipe (4); one end of the main pipe (4) is connected to a disinfection water tank (2), and the other end is connected to the water inlet of the pressure pump (5); the water outlet of the pressure pump (5) is connected to the secondary pipeline (6), and the secondary pipeline (6) is provided with several nozzles (7). The system can be used for real time and complete spray disinfection of pig carrying vehicle through induction control, simultaneously the system can effectively control application amount of antiseptic solution, and has the advantages of simple structure, convenient usage, and automation operation.